Wrench



(No Model.)

A. HULLINGER.

WRENCH.

N0. 597,081. Patented Jan.11,1898

Wiigzsszs UNITED STATES ATENT Fries.

ANDREN HULLINGER, OF JEXVETT, OHIO.

WRENCH.

SPECIFICATION forming part of Letters Yatent No. 597,081, dated January1 1, 1898.

Application filed May '7, 1897, erial No. 635,575. (No model.)

T0 at whom it may concern.-

Be it known that 1, ANDREW HULLINGER, a citizen of the United States,residing at Jewett, in the county of Harrison and State of Ohio,haveinvented a new and useful Wrench, of which the following is aspecification.

The invention relates to improvements in wrenches.

The object of the present invention is to improve the construction ofratchet-wrenches and to provide a simple and inexpensive one adapted tobe readily reversed to enable a nut to be screwed on or ofi. a bolt andcapable of convenientadj ustnient to adapt the clamping bars or jaws tothe size of the nut or part to be gripped.

The invention consists in the construction and novel combination andarrangement of parts, as hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a plan view of a ratchet-wrench constructedin accordance with this invention. Fig. 2 is a longitudinal sectionalview on line 2 2 of Fig. 1. Fig. 3 is a similar View taken on line 3 3of Fig. 2. Fig. lis a detail perspective view of the clampingjaws andthe adjusting -screws, showing the gearing for connecting the latter.

Like numerals of reference designate corresponding parts in the severalfigures of the drawings.

1 designates a shank or stock constituting a handle and provided at oneend with a circular head or ring 2, receiving a rotary hub or casing 3,which carries a pair of adjustable clamping bars or jaws 1-. The rotaryhub or casing which forms a housing for the jaws or clamping-bars andthe means for adjusting the same is composed of two sections 5 and 6,and the section 6 is provided with an annular series of ratchet-teeth 7,forming a ratchet wheel and adapted to be engaged by a pair ofoppositelyextending spring-actuated pawls or dogs 8, mounted onthe'handle or stock adjacent to the circular head or ring and adapted toengage the ratchet-wheel alternately, whereby the casing or hub may berotated in either direction to screw or unscrew a nut. The sections ofthe casing or hub are detachabl'y connectedby screws 9 or other suitablefastening devices, which enable the clamping bars and the adjustingdevices to be readily inspected.

The oppositelyextending dogs or pawls S are held in engagement with theratchetwheel by their springs, and one or the other is maintained out ofengagement by a cam 10, journaled in a recess of the handle or stock andprovided with an exterior handle 11, which enables the 0am to forceeither of the dogs or pawls back from the ratchet-wheel and permit theother to spring into engagement with the same. The recess which receivesthe pawls and the cam is covered by a suitable face-plate 12, which isprovided with an opening to receive one end or journal of the cam, whichis disposed between the pawls or dogs.

The sections of the casing are provided at opposite sides of the wrenchwith openings 13 and are recessed at their inner faces to receive theclamping bars or jaws 4, which are mounted on parallel adjusting screws14, journaled in suit-able bearings of the casing or hub at the ends ofthe recesses of the sections and provided with right and left handthreaded portions, which engage correspondingly-threaded openings of theends of the clamping bars or jaws at.

The adjusting-screws have keyed to them sprocket-pinions 15, which areconnected by a sprocket-chain 16, and one of the adjustin g-screws isprovided with a flattened extension 17, terminating short of theperiphery of the rotary casing or hub.

The adj ustin g-screw which is provided with the extension 17 is adaptedto be engaged by a longitudinally-movable shaft or stem 18, mounted in abore or opening of the stock or handle and adapted to engage the saidadjusting-screw when the parts are properly positioned, the casing beingdesigned to be provided with a suitable index-mark 19 to facilitate thearrangement of the flattened eX- tension 17 opposite the shaft or stem18.

The shaft or stem 18 is provided at its inner end with a grooved head21, adapted to receive and interlock with the extension 17 of theadjusting-screw, whereby when the shaft or stem is rotated theadjusting-screws will be simultaneously operated an d will move theclamping bars or jaws to and from each other, according to the directionof rotation of the shaft or stem. The outer end of the shaft or stem issquared and is provided with a threaded portion and receives a sectionalThe inner section of the knob is knob 22. provided with a rectangularopening and is arranged on the squared portion of the shaft or spindle,and the outer sectionis provided with a threaded opening and serves as anut to engage thethreaded portion of the shaft 1 to enable a nut to berotated in either direction, andthat it may be operated in small spaceswhere an ordinary wrench would be practically inoperative.

What I claim is 1. In a wrench, the combination of a stock provided witha head, a rotary casing journaled in the head and having an opening toreceive a nut, a pair of clamping-bars mount- :ed in the casing at theopening and adapted to engage a nut, saidrclamping-bars being providedat theirendswith threaded openings, adjusting-screws journaled in thecasing and provided with rightand left hand threaded portions engagingthe threaded openings of the clamping-bars, gearing connecting theadjusting-screws, and K163411511)? operating the latter, substantiallyas de-i scribed. V l v 2. In a Wrench, the combinationof a'stockprovided with a head, a casing mounted in the head and capable ofrotation, a pair of clampin g-bars arranged Withinthe casing andprovided with threaded openings, adjustingscrews journaled in the casingand having right and left hand threaded portions engaging the threadedopenings of the clampingbar, gearing connecting the adjusting-screws,and a longitudinally-movable shaft mounted on the stock and arranged tointerlock with one of the adjusting-screws when the same is 7 broughtoppositeit, substantially as and for r r 'the purpose described.

3. In a wrench, the combination of a stock having a head, a rotarycasing mounted on the latter, a pair of clamping-bars arranged withinthe casing, adjusting-screws having right and left hand threadedportions engagring the clamping-bars, one of the adjustingscrews beingprovided with an extension,

gearing connecting the adjnsting-screws, a longitudinally-inovable shaftmounted on the stock and providedat one end with a grooved head toreceive and interlock with the extension of the adjusting-screw, and aknob or handle arranged at the otherend of the shaft,

substantially as described.

teeth, pawl-s mounted on the stock and adapted to engage theratchet-whecl alternately, clamping-bars arranged within the casing,

adj listing-screws engaging the clamping-bars and journaledi'n thecasing, sprocketpini0ns mounted on the screws, a sprocket-chani arrangedon the pinions and. connecting the screws, and a shaft mounted on thestock and I adapted to interlock with one of the screws when the sameisbrought opposite it, substantially as described.

In testimony that I claim the foregoing as my own I havehereto affix-edmy signature in the presence of two witnesses.

ANDREW HULLINGER.

Witnesses HAYS SHUGERT, JAMES AIKEN.

, 4. In a wrench, the combination of a stock, r I a rotary casingmounted on the stock and composed of two separable sections, one of thesections vbeing provided with ratchet--

